Features
- LP-HCSL outputs eliminate 16 resistors; save 32mm2 of area
- PCIe Gen 1–5 compliance
- 4 OE# pins; SMBus control also available
- 3 selectable SMBus addresses
- 2 selectable ZDB bandwidths; minimizes jitter peaking in cascaded PLL topologies
- Hardware/SMBus control of ZDB bandwidth and fanout modes
- Spread spectrum compatible
- 100MHz ZDB mode
- 5mm × 5mm 32-VFQFPN package; small board footprint
Description
The 9ZXL0451E is a second-generation enhanced performance DB800ZL derivative for PCIe Gen 4 and 5 applications. In fanout (bypass) mode, it is DB2000Q compatible. A fixed external feedback in zero-delay buffers (ZDB) mode maintains low drift for critical QPI/UPI.
Parameters
| Attributes | Value |
|---|---|
| Diff. Outputs | 4 |
| Diff. Output Signaling | LP-HCSL |
| Output Freq Range (MHz) | 1 - 400 |
| Diff. Inputs | 1 |
| Diff. Input Signaling | HCSL |
| Accepts Spread Spec Input | Yes |
| Power Consumption Typ (mW) | 158 |
| Supply Voltage (V) | 3.3 - 3.3 |
| Output Type | LP-HCSL |
| Diff. Termination Resistors | 24 |
| Package Area (mm²) | 81 |
| Battery Backup | No |
| Battery Seal | No |
| CPU Supervisory Function POR | No |
| Crystal Frequency Trimming | No |
| Frequency Out Pin | No |
| Inputs (#) | 1 |
| Input Freq (MHz) | 33 - 150 |
| Function | Zero Delay Buffer |
| Input Type | HCSL |
| Output Banks (#) | 1 |
| Core Voltage (V) | 3.3 |
| Output Voltage (V) | 0.7 |
| Product Category | PCI Express Clocks, Processor Clock Buffers, Zero Delay Buffers |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| VFQFPN | 5.0 x 5.0 x 0.9 | 32 | 0.5 |
Applications
- Servers/High-performance computing
- nVME storage
- Networking
- Accelerators
- Industrial control
| Part Number | Status | Samples | Stock | Package | Budgetary Price (USD) | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Qty. per Reel (#) | Qty. per Carrier (#) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9ZXL0451EKILF | Active | Available | Out of Stock | VFQFPN | 1ku | $1.78 | 32# | Tray | 3 | 0 | 490# | Yes | e3 Sn | -40 to 85°C | MALAYSIA | TAIWAN |
| 9ZXL0451EKILFT | Active | N/A | Out of Stock | VFQFPN | 1ku | $1.78 | 32# | Reel | 3 | 2500# | 0 | Yes | e3 Sn | -40 to 85°C | MALAYSIA | TAIWAN |
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- Product Change NoticePDF 203 KB Mar 02, 2026
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- Application NotePDF 235 KB 7WDXRDKU4E7E-5-58851 Apr 08, 2015
- Application NotePDF 170 KB 7WDXRDKU4E7E-5-57318 May 13, 2014
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Recommended Documents (1)
- DatasheetPDF 474 KB Dec 19, 2022
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- Application NotePDF 431 KB 7WDXRDKU4E7E-5-59216 Dec 06, 2023
- Application NotePDF 1.99 MB 7WDXRDKU4E7E-5-57242 Mar 01, 2022
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Application Notes & White Papers (14)
- Product Change NoticePDF 203 KB Mar 02, 2026
- Product Change NoticePDF 734 KB Nov 16, 2022
- Product Change NoticePDF 728 KB May 13, 2022
- Product Change NoticePDF 726 KB Aug 20, 2021
- Product Change NoticePDF 983 KB Jun 25, 2019
Product Notices (PCN, EOL, etc) (5)
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Introducing Renesas’ enhanced PCIe clock buffer family. These PCIe Gen5 clock buffers offer fanout and zero-delay operating modes, supporting both legacy systems and the most complex timing trees within a single device. Unlike many existing solutions, whose performance limitations force their use in fanout buffer mode, these clock buffers meet both PCIe Gen5 and prominent CPU-specific phase jitter requirements in all operating modes. The extremely low 50fs rms PCIe Gen5 additive phase jitter enables multi-level cascading within the strict PCIe Gen5 jitter budget. Renesas’ high-performance oscillators and clock generators provide an ideal clock source for the enhanced PCIe clock buffer family.
A detailed overview of IDT's full-featured PCI Express (PCIe) clock and timing solutions. The presentation addresses PCIe Gen 1, Gen 2, Gen 3, and Gen 4 architectures and how IDT's industry-leading solutions provide all the functions, features, and performance required by the application.
Presented by Ron Wade, System Architect at IDT. For more information visit the PCIe clocks page.
The 9ZXL1951D is designed to create clocks for PCI Express Generation 4. This video demonstrates how the reference clock for the 9ZXL1951D does not need to be PCI Express Gen4 compliant. When using the Low Bandwidth mode, the 9ZXL1951D will attenuate jitter so its output clocks still pass PCI Express Gen4, even when the input clock only passes PCI Express Gen3. This is most useful when the clock has spread spectrum modulation because it is very difficult to make a very low noise spreading clock.
A brief overview of how data rates have changed from PCI Express (PCIe) Generation 1, Gen 2, Gen 3, Gen 4 and Gen 5.
Presented by Ron Wade, system architect at IDT.
A brief overview of how clock and timing specifications have changed from PCI Express (PCIe) Generation 1, Gen 2, Gen 3, Gen 4 and Gen 5.
Presented by Ron Wade, system architect at IDT (acquired by Renesas).
A brief overview of the PCI Express common clock (CC) jitter model, and the transfer functions as they relate to the timing PLLs. This model applies to PCI Express (PCIe) Gen 2, Gen 3, Gen 4 and Gen 5. The equations would be slightly different for other PCIe architectures, such as SRIS, SRnS, or data clocked.
Presented by Ron Wade, system architect at IDT (acquired by Renesas). For more information about Renesas's PCIe timing solutions, visit the PCI Express (PCIe) Clocks page.
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